Water ttjbe boiler



(No Model.) 2 :sheets-sheet 1,

R. R. ZELL.

vQVATER TUBI: BOILER.

110.469,810. L; Patented Mar. 1,1892.

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R. Rv. ZELL. WATER TUBE BOILBR.

No. 469',810. Patented Mar. 1. 1892.

UNITED STATES PATENT OFFICE.

ROBERT R. ZELL, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE CAMPBELL 'duZELLA COMPANY, OF SAME PLACE.

`WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 469,810, dated March 1,1892.

Application filed November 19, 1891. Serial No. 412,365. (No model.)

To all whom it may concern: on horizontal wrought-iron beams E', the Beit known that I, ROBERT R. ZELL, of drum A by a rest F and rollers h h,and the Baltimore, in the State of Maryland, have indrum O on the saddleI. The drum B is supvented a new and useful Improvement in ported on thesaddle H, resting upon suitable 55 5 Water-Tube Boilers, of which thefollowing, brick-work in the bottom of the furnace.

taken in connection with the accompanying The furnace is of the ordinaryconstruction drawings, is a specification'. and is Vprovided with agrate c, resting upon This invention has for its object to producesuitable supports c2 in the front furnace-wall an improved water-tubeboiler which is sim- A', and a bridge-wall b. c represents the 6o 1oplein construction, efficient in operation, and the opening throughwhich the fuel is introone in which the circulation is continuous7 ducedto the grate c. Deflectors a. a of firethereby avoiding the burning outof the parts brick are arran'ged above the upper series of due to thedeposit of sediment on the inside tubes d and g and serve to deflect theproof the parts exposed to the directaction of the lducts of combustionaround and through the 65 I5 products of combustion, and, further, aboiler tubes, compelling the products of combustion having a largeheating-surface, whereby the to take a circuitous route, therebyexposing a circulation is increased and the steam rapidly large surfaceto said products of combustion,

generated. by means of which the water is rapidly heat- My inventionconsists of certain novel feaed, a perfect circulation is produced, and7o 2o tures of construction, combination of parts, steam is rapidlygenerated.

and arrangement of co-operating parts, all The boiler, as abovedescribed, can be made as hereinafter described, and particularly setentirely of steel, and will have a very small forth in the claims.number of openings and joints, and is Well In the accompanying drawings,which illusadapted for high pressures. The tubes d and 7 5 25 trate myinvention, Figure l is a side elevag can be tapped or otherwise securedto the tion ofthe boiler with the side furnace-wall respectivewater-drums A, B, and C. omitted, so as to show the arrangement of the KK represent doors, by means of which connections of the various parts ofthe boiler. access is had to the interior of the furnace, for Fig. 2 isa rear elevation of the boiler. the purpose of cleaning out or forrepairs. 8o 3o Referringto theviews of the drawings,itwill By means ofthe rollers h 7L, having suitbe seen that within the furnace-walls Athere able supports, the expansion and contraction is arranged a watertubular boiler consisting of the various parts of the boiler is providedof three cylindrical water-drums A, B, and O, for without breakage orloosening of any of arranged sidewise tothe furnace. The drum the parts,as the rollers permit alongitudinal 8 5 35 B is connected to the drum Aby means of the movement forward or backward, due either t-o curvedinclined tubes d, and the drum A is expansion or contraction. connectedwith the drum C by means of the The water-drums A, B, and C and thesteam curved inclined tubes g. The tubes CZ and g and water drum D areprovided with the are arranged in rows across the furnace and usualhand-holes and hand-hole covers L. 9o 4o in each row are parallel toeach other, and in The boiler is provided with the usual lire-box eachrow are located above the spaces between and ash-pit doors and the usualgage-cocks, the tubes in the row beneath, as shown in Fig.equalizing-pipes, and safety-valves. 2, thereby forming a staggeredarrangement The operation of the boiler is as follows: of the tubes, bymeans of which a large heat- The feed-water is introduced into the drum95 45 ing-surface is exposed to the re, which is C by means of the pipeM, provided with a broken up by the staggered arrangement of valve m',and being heavier than the heated the tubes. From the said drum Oseveral water in' the boiler descends through 'the tubes pipes .I extenddownward to the drum B. The J into the lower cylindrical boiler-drum B,steam-drum D is connected to the drum A which acts as a water-leg andmud-drum or roe 5o and the drum C by the pipes F and E, re.- separator.The tubes CZ enter the sides ofthe spectively. The drums Aand Caresupported said water-drums radially or at a line drawn through theircenters. The circulation of the water will be across the drum B, asshown by the arrows, and upward through theinclined tubesd into thewater-drum A, and from said water drum the water can return eitherthrough the inclined tube g to the drum C to mix with the incomingfeed-water, or may ascend through the pipes F into the steam and waterdrum D, the water in the said steamwater drum descending by means of thepipes E, where it mixes with the feed-water introduced into the drum Cby the pipe M, provided with the valve m', and the circulation of thewater continues in this manneraround and through the various drums andtubes.

'The sediment in the water is deposited in the bottom of the drum B,from which it may be blown o through the pipe L, having the valve Z, asshown in Fig. 2, or cleaned out from time to time. 'lhe facilities forcleaning the boiler are excellent, as by the construction abovedescribed the deposit takes place in the drum B, from which it can beeasily cleaned out. The construction of the boiler also admits of manyboilers being set up in a continuous battery, as they can be cleanedfrom the ends and top instead of the sides, as with the other water-tubeboilers now in use..

By closing the valve m in the pipeM and opening the valves m in the pipeM and valve Z in the pipe L the boiler may be blown od.

I do not intend to limit myself to the exact construction sho'wn, as thesame may be varied without departing from the spirit of my invention.

Having thus ascertained the nature and set forth the construction of myinvention, what I claim as new, and desire to secure by Letters Patentof the United States, is-

1. In a water-tube boiler, the combination of a mud-drum, cylindricalwater-drums at lthe front and rear of the furnace arranged above saidmud drum, with one series of curved inclined water-tubes connecting saidmud-drum and the front water-drum and another Series of curved inclinedwater-tubes connecting the front and rear water-dru ms, a feed-pipeentering the rear water-drum, and a steam and water drum connected tothe said water-drums, said water-tubes entering the drums at a linedrawn through their centers, substantiallyas set forth.

2. In a Water-tube boiler, the combination of a lnud-drum, cylindricalwater-drums at the front and rear of the furnace arranged aboveV saidmud-drum, with two series of curved water-tubes arranged across thefurnace in rows and communicating at one end with the front water-drumand at the other end communicating, respectively, with the muddrum andthe rear water-drum, pipes connecting the rear water-drum and themuddrum, a `feed-water pipe entering the said rear water-drum, and asteam and water drum -in communication with said water-'drums,the

said water-tubes entering the drums at a line drawn through theircenters, substantially as set forth.

In a water-tube boiler, the combination of a mud-drum, two water-drumsarranged above said mud-drum, with two series of water-tubescommunicating at one end with one of the water-drums and at the otherend comimunicating, respectively, with the muddrnm 4arranged above saidmud-drum, with two series of staggered Water-tubes communicating at oneend with the front Water-drum and at the other end communicating,respectively', with the mud-drum and the rear water-drum, a feed-waterpipe entering the said rear wa ter-drum, a steam and water drum incommunication with said water-drums, and detiectors arranged above theupper layer of each series of water-tubes in opposite directions, so asto cause a circuitous travel to the products of combustion,substantially as set forth.

5. In a water-tube boiler, the combination of a mud-drum, front and rearwater-drums arranged above said mud-drum, with one series of curvedinclined staggered water-tubes connecting said mud-drum and the frontwater-drum and another series of curved in clined staggered water-tubesconnecting the front and rear water-dru ms, a feed-water pipe enteringthe said rear water-drum, a steam and water drum in communication withsaid water-drums, and deflectors arranged above the upper layer of eachseries of water-tubes in opposite directions, so as to cause acircuitous travel to the products of combustion, substantially as setforth.'

G. In a Water-tube boiler, the combination of a mud-drum, water-drumsarranged above said mud-drum, with two series of water-tubescommunicating at one end with one of thc water-drums andat the other endcommnnieating, respectively, with the mnd-drum and the other water-drum,a steam and water drum in` communication with the water-drums, ayielding support for the water-drum with which all the tubescommunicate, and supporting-beams for the watcrdrums, substantially asset forth.

In testimony whereof 4 I have signed my name to this specification, inthe presence of two subscribing witnesses, on this 16th day of November,A. D. 1891.

ROBERT R. ZELL.

Witnesses:

J. VERNON CAMPBELL, GEO. P. FLINN.

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